body * {
  box-sizing: border-box;
  /* flex-shrink: 0; */
}
body {
  font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma, Arial, PingFang SC-Light, Microsoft YaHei;
  overflow-x: hidden;
}
html, body {
  height: 100vh;
  margin:0;
  scroll-behavior: smooth;
}
.container {
  max-width: 1920px;
  margin: auto;
  background-color: #fff;
}
.main {
  width: 1200px;
  height: auto;
  margin: auto;
}
button {
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  outline: none;
  background-color: transparent;
}
button:active {
  opacity: 0.6;
}
.flex-col {
  display: flex;
  flex-direction: column;
}
.flex-row {
  display: flex;
  flex-direction: row;
}
.justify-start {
  display: flex;
  justify-content: flex-start;
}
.justify-center {
  justify-content: center;
}
.justify-end {
  display: flex;
  justify-content: flex-end;
}
.justify-evenly {
  display: flex;
  justify-content: space-evenly;
}
.justify-around {
  display: flex;
  justify-content: space-around;
}
.justify-between {
  display: flex;
  justify-content: space-between;
}
.align-start {
  display: flex;
  align-items: flex-start;
}
.align-center {
  align-items: center;
}
.align-end {
  align-items: flex-end;
}
.flex {
  display: flex;
}
.h-full {
  height: 100%;
}
.w-full {
  width: 100%;
}
.w-100 {
  width: 100px;
}
.w-200 {
  width: 200px;
}
.w-300 {
  width: 300px;
}
.w-400 {
  width: 400px;
}
.w-500 {
  width: 500px;
}
.w-600 {
}
/*公共类*/
.fl {
  float: left;
}
.fr {
  float: right;
}
.al {
  text-align: left;
}
.ac {
  text-align: center;
}
.ar {
  text-align: right;
}
.hide {
  display: none;
}
.overflow {
  overflow: hidden;
}
.margin-auto {
  margin: auto;
}
.block {
  display: block;
}
.pos-relative {
  position: relative;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}
input[type="number"] {
  -moz-appearance: textfield;
}